Now to access this variable Num1 and display value hold by attribute we use {!v.Num1}, Where {!v.xxx} is used to get value hold by attribute. So basically lightning aura attributes are used to display something on front-end in application or component and for the back-end, we will use a.js controller.
Full Answer
How do you get attribute value in lightning controller?
To retrieve an attribute value of a component reference, use component. find("cmpId"). get("v. value") .
How do I find my aura ID in lightning component?
Retrieve a component by its ID in JavaScript code. Use aura:id to add a local ID of button1 to the lightning:button component. You can find the component by calling cmp. find("button1") , where cmp is a reference to the component containing the button.
What is Aura attribute in lightning?
An aura attribute is like a variable that we use in programming language or in Apex class. These are typed fields and set on a specific instance of a component. These attributes can be used inside the component as expressions and in controller and helper as well.
How do you set an attribute value in aura?
Aura:set can be used to set the value of an attribute on the component reference. In case of
How can I get my aura ID on click?
Each button has a unique local ID, set by an aura:id attribute. Use event. getSource() in the client-side controller to get the button component that was clicked. Call getLocalId() to get the aura:id of the clicked button.
How do you retrieve aura component in VS code?
Salesforce CLI. Visual Studio Code or another code editor....To create and deploy an Aura Component to your org:Create a Salesforce DX project. In Visual Studio code, open the Command Palette by pressing Ctrl+Shift+P on Windows or Cmd+Shift+P on macOS. ... Create an Aura component. ... Authenticate to your org. ... Deploy your files.
What are the attributes in Aura component?
aura:attribute describes an attribute available on an app, interface, component, or event. An attribute of an aura:method can have a type corresponding to a JavaScript function so that you can pass a function into the method. An attribute of a component can't have a type corresponding to a JavaScript function.
What is Aura ID in Salesforce?
aura:id is a local id. A local ID is an ID that is only scoped to the component. A local ID is often unique but it's not required to be unique.
How do you find the map value in the lightning component?
So in the return of this class is Map in the Lightning controller: var resMap = a. getReturnValue(); Then access map value like this: resMap['GetKey'];
What is action setCallback in lightning?
setCallback() Sets the callback function that is executed after an Apex action returns.
What is event getSource ()?
event. getSource() helps you determine which component fired an event.
How do you get the aura component in developer console?
Create Aura Components in the Developer ConsoleOpen the Developer Console. ... Open the New Lightning Bundle panel for an Aura component. ... Name the component. ... Describe the component. ... Add component configurations to the new component. ... Click Submit to create the component.